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HK: Fachverband Physik der Hadronen und Kerne

HK 36: Postersitzung

HK 36.26: Poster

Mittwoch, 17. März 2010, 14:00–16:00, HG Aula

Large scale survey of lifetimes and reaction rates for the astrophysical r-process — •Jochen Erler¹, Hans Peter Loens², Paul-Gerhard Reinhard¹, Gabriel Martinez-Pinedo², and Karlheinz Langanke² — ¹Institut für Theoretische Physik II, Universität Erlangen-Nürnberg — ²Gesellschaft für Schwerionenforschung, Planckstr. 1, 64291 Darmstadt

We present a large scale survey of lifetimes and reaction rates in the regime of SHE for extremely neutron rich nuclei relevant for the astrophysical r-process.

The three competing decay channels spontaneous fission, α-decay and β-decay are compared.

Lifetimes and reaction rates are calculated on the basis of the self-consistent Skyrme-Hartree-Fock model. Where the tunneling probability for spontaneous fission is estimated by the WKB approximation. To get the necessary ingredients for this approximation namely the collective masses and the corrected potential energy surface self-consistent cranking is used. The halflife for α-decay are calculated from the Q_α reaction energies using an estimate based on the Viola systematics.